GaGa will then sing on the Thursday night results show, which will also feature a performance from dance ground LXD.

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Fox has also announced the all-stars who will be appearing alongside the Top 8 on the Wednesday performance night: Lauren Froderman, Anya Garnis, Jaimie Goodwin, Lauren Gottlieb, Neil Haskell, Ivan Koumaev, Pasha Kovalev and Ade Obayomi.